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24.0857 Corrosion control-Internal

Cite as [A.S.A.C. § 24.0857]

(a) General.

(1) Corrosive gas may not be transferred by pipeline, unless the corrosive effect of the gas on the pipeline has been investigated and steps have been taken to minimize internal corrosion.

(2) Whenever any pipe is removed from a pipeline for any reason, the internal surface must be inspected for evidence of corrosion. If internal corrosion is found---

(A) The adjacent pipe must be investigated to determine the extent of internal corrosion;

(B) Replacement must be made to the extent required by the rules incorporated under 24.0859;

(C) Steps must be taken to minimize the internal corrosion.

(3) Gas containing more than 0.1 grain of hydrogen sulfide per 100 standard cubic feet may not be stored in pipe-type or bottle-type holders.

(b) Monitoring. If corrosive gas is being transported, coupons or other suitable means must be used to determine the effectiveness of the steps taken to minimize internal corrosion. Each coupon or other means of monitoring internal corrosion must be checked two times each calendar year, but with intervals not exceeding 8 months.

History: Rule 02-01, eff 30 Aug 01.